Posting grades from Canvas to PowerSchool

I found this feature last semester--first year our school district has had CANVAS--nothing would happen--but read some information asked the district and now it will allow the post. I named the group in CANVAS the same name convention as in PowerSchool it will post but all grades from CANVAS go in as Homework, then have to be converted. Weighted grades in Canvas the same as our gradebook. School has us do 40% Formative and 60% Summative--what am I doing wrong and where can I go to read up on posting to PowerSchool--I read about this in December/Early January now I can not go back. Thanks for input.